Tests

Improve melos configuration #600

Job	Run time
Check formatting (dio)	13s
Check formatting (example)	11s
Check formatting (example_flutter_app)	10s
Check formatting (plugins/cookie_manager)	15s
Check formatting (plugins/http2_adapter)	11s
Check formatting (plugins/native_dio_adapter)	15s
Analyze Dart-only libraries (dio)	20s
Analyze Dart-only libraries (example)	16s
Analyze Dart-only libraries (plugins/cookie_manager)	16s
Analyze Dart-only libraries (plugins/http2_adapter)	16s
Analyze Flutter libraries (example_flutter_app)	32s
Analyze Flutter libraries (plugins/native_dio_adapter)	34s
Run unit tests with Flutter plugins	0s
Run unit tests with dio	0s
Run unit tests with plugins	0s
	3m 29s

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